Quasi block copolymers noncovalent bonded by stereocomplex crystals
Self-assembly of block copolymers (BCPs) yields unparalleled opportunities to integrate exquisite characteristics for preparation of advanced nanotechnology materials. The high-yield manufacturing of BCP is extremely desired, yet rarely exploited. Herein, we displayed that stereocomplex crystals (sc...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-06-01
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| Series: | Giant |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666542523000127 |
| _version_ | 1797801711326199808 |
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| author | Jiali Wu Yihang Chen Hengti Wang Yongjin Li |
| author_facet | Jiali Wu Yihang Chen Hengti Wang Yongjin Li |
| author_sort | Jiali Wu |
| collection | DOAJ |
| description | Self-assembly of block copolymers (BCPs) yields unparalleled opportunities to integrate exquisite characteristics for preparation of advanced nanotechnology materials. The high-yield manufacturing of BCP is extremely desired, yet rarely exploited. Herein, we displayed that stereocomplex crystals (sc) of poly lactide (PLA) enantiomers, acting as pseudo linkage between adjacent polymer chains, enable formation of quasi-block copolymer (qBCPs) by straightforward melt compounding. Identical content of poly (D-lactide) (PDLA) and poly (L-lactide) (PLLA) were pre-grafted onto the backbones of poly styrene (PS) and poly (methyl methacrylate) (PMMA), respectively. Due to the complementary multiple hydrobonding interactions between PDLA and PLLA grafted moieties, PS-“block”-PMMA connected by cocrystallized sc was induced during the subsequent melt processing of PDLA-g-PS/PLLA-g-PMMA, thus allowing local segregation of PS-“block” and PMMA-“block” with nanometer size. The refined morphology, which was resembled with micro-phase separation of classical BCP, can be facilely tuned by varying the length and ratio of enantiomeric PDLA/PLLA grafts. More interestingly, the PS-“block”-PMMA typed qBCPs demonstrated superiority in compatibilizing immiscible PS/PMMA polymer blends, as compared with the classical compatibilizer (PS-block-PMMA) via reactive blending. Overall, our strategy represents a general method to construct noncovalent linked di-block copolymer via industrially relevant melt processing, which is quite challenging to achieve by existing synthetic technologies. |
| first_indexed | 2024-03-13T04:54:38Z |
| format | Article |
| id | doaj.art-760f09bfaa0d4787a0732f0ea42d12f5 |
| institution | Directory Open Access Journal |
| issn | 2666-5425 |
| language | English |
| last_indexed | 2024-03-13T04:54:38Z |
| publishDate | 2023-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Giant |
| spelling | doaj.art-760f09bfaa0d4787a0732f0ea42d12f52023-06-18T05:03:27ZengElsevierGiant2666-54252023-06-0114100150Quasi block copolymers noncovalent bonded by stereocomplex crystalsJiali Wu0Yihang Chen1Hengti Wang2Yongjin Li3College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, Zhejiang, PR ChinaCollege of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, Zhejiang, PR ChinaCorresponding authors.; College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, Zhejiang, PR ChinaCorresponding authors.; College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, Zhejiang, PR ChinaSelf-assembly of block copolymers (BCPs) yields unparalleled opportunities to integrate exquisite characteristics for preparation of advanced nanotechnology materials. The high-yield manufacturing of BCP is extremely desired, yet rarely exploited. Herein, we displayed that stereocomplex crystals (sc) of poly lactide (PLA) enantiomers, acting as pseudo linkage between adjacent polymer chains, enable formation of quasi-block copolymer (qBCPs) by straightforward melt compounding. Identical content of poly (D-lactide) (PDLA) and poly (L-lactide) (PLLA) were pre-grafted onto the backbones of poly styrene (PS) and poly (methyl methacrylate) (PMMA), respectively. Due to the complementary multiple hydrobonding interactions between PDLA and PLLA grafted moieties, PS-“block”-PMMA connected by cocrystallized sc was induced during the subsequent melt processing of PDLA-g-PS/PLLA-g-PMMA, thus allowing local segregation of PS-“block” and PMMA-“block” with nanometer size. The refined morphology, which was resembled with micro-phase separation of classical BCP, can be facilely tuned by varying the length and ratio of enantiomeric PDLA/PLLA grafts. More interestingly, the PS-“block”-PMMA typed qBCPs demonstrated superiority in compatibilizing immiscible PS/PMMA polymer blends, as compared with the classical compatibilizer (PS-block-PMMA) via reactive blending. Overall, our strategy represents a general method to construct noncovalent linked di-block copolymer via industrially relevant melt processing, which is quite challenging to achieve by existing synthetic technologies.http://www.sciencedirect.com/science/article/pii/S2666542523000127Quasi-block copolymer (qBCPs)Stereocomplex crystal junctionNanostructureNoncovalent compatibilization |
| spellingShingle | Jiali Wu Yihang Chen Hengti Wang Yongjin Li Quasi block copolymers noncovalent bonded by stereocomplex crystals Giant Quasi-block copolymer (qBCPs) Stereocomplex crystal junction Nanostructure Noncovalent compatibilization |
| title | Quasi block copolymers noncovalent bonded by stereocomplex crystals |
| title_full | Quasi block copolymers noncovalent bonded by stereocomplex crystals |
| title_fullStr | Quasi block copolymers noncovalent bonded by stereocomplex crystals |
| title_full_unstemmed | Quasi block copolymers noncovalent bonded by stereocomplex crystals |
| title_short | Quasi block copolymers noncovalent bonded by stereocomplex crystals |
| title_sort | quasi block copolymers noncovalent bonded by stereocomplex crystals |
| topic | Quasi-block copolymer (qBCPs) Stereocomplex crystal junction Nanostructure Noncovalent compatibilization |
| url | http://www.sciencedirect.com/science/article/pii/S2666542523000127 |
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